基于二硫化钼/多孔石墨烯复合材料的木犀草素电化学传感器

Molybdenum Disulfide/Porous Graphene Composite-based Electrochemical Sensor for Detection of Luteolin

以多孔氧化石墨(p GO)、(NH_4)_6Mo_7O_(24)·4H_2O和NH_2CSNH_2为原料,用水热法在180℃下反应24 h,合成了MoS_2/多孔石墨烯(pGN)复合材料。pGN的多孔结构可缩短反应物扩散路径,增加电极和电解液之间的接触面。基于此复合材料的木犀草素电化学传感器的线性检测范围为0.01～5.0μmol/L,检出限为6.0 nmol/L (S/N=3)。将此传感器用于口服液和花生壳试样中木犀草素的检测,加标回收率为91.8%～102.4%,相对标准偏差(RSD)小于5.6%。

Molybdenum disulfide/porous graphene(MoS 2/pGN)composite was synthesized by a simple hydrothermal method.The pGN was not easy to aggregate and could provide large surface for MoS 2 growing.Therefore,the stacking of MoS 2 nanosheets was effectively restrained and showed few-layer nanosheet structure,showing outstanding electrochemical feature.In addition,the pGN could shorten the diffusion pathways and facilitate the electron transfer of target analyte.Hence,the composite modified electrode presented sensitive response to luteolin.The linear determination range was 0.01-5.0μmol/L and the detection limit was 6.0 nmol/L(S/N=3).The sensor could be applied to the detection of luteolin in oral solution and peanut hulls,with recoveries of 91.8%-102.4%and relative standard deviations(RSDs)of below 5.6%.